Lifetimes practice problems in Rust

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Showing 19 of 19

Status	Title	Difficulty	Category	Tags
	Borrow it or own it: your first lifetime decision	Easy	Primitives
	Cow: borrow until you have to own	Medium	Primitives
	Cow in API design: impl Into<Cow<str>>	Hard	Framework
	flat_map: expand a range spec like "1-3,7,10-12"	Medium	End-to-End
	Generics, traits and lifetimes in one signature	Medium	Primitives
	Let elision do it	Easy	Primitives
	`longest`: writing your first `'a`	Medium	Primitives
	Make the lint happy: `'_` in return paths	Easy	Primitives
	Make your own collection iterable, all three ways	Hard	Framework
	move: when the closure must own its captures	Medium	Primitives
	Needless clone: the most common review comment in Rust	Medium	End-to-End
	Non-lexical lifetimes: a borrow ends at its last use	Easy	Primitives
	Returning impl Trait, and what edition 2024 changed	Hard	Primitives
	Slices are borrows	Easy	Primitives
	Trait objects and lifetimes: Box<dyn Trait + 'a>	Hard	Primitives
	`T: 'static` in practice — a type-erased handler registry	Hard	End-to-End
	Two inputs, one output lifetime	Medium	Primitives
	Zero-copy parsing: borrow, don't allocate	Medium	Primitives
	Zero-copy tokenizer: `Parser<'a>`	Hard	End-to-End